Sound-reproducing device



J. B. ELE NSCHNEIDER SOUND REPRQDUCING DEVICE Jan. 1, 1929.

2 Sheets-Sheet 1 Filed 09 12, 2925 NVE 1012..

' ATTORNEY,"

3 Jan. 1, 1929.

1,696,941 J. B. ELENSCHNEIDER SOUND REPRODUCING DEVICE Filed Deg. 12, 1925 2 Sheets-Sheet 2 vpiovicke uno Patessieii Jase, i lees 5% fin-i) is 1% SGUIQD-BEZEEQHJDUGEHE? DEV'LIE,

s ummn filed December 12,

Another object sf my invention is {he eroduction of a sound reproducing" device has I mg nested comcai vibrating membranes,

distinguished fmm {he weil-knewn opposed cone type. I

A still further ob ect of this invention the provision of a, new and navel method a nd means for mounting these nesied cone membranes.

Another object of this invention is the p10 vision of a sound reproducing device which is simple and easy to construe-i5, eiiis'eni'. in operation, and easy to'maintein iii par-speladjustment. I itis also an object of this invention to provide a sound reproducing device having vibrating member which is free its edges, so that it adjust its-elf to atmospheric conditions, such as tempemture i'noisture cimnges, Wiehouic eausing the membranes to wvlinkie and warp and thus destroy its sound reproducing qualities.

The Hfi SIIHOB resides substantiaiiy H}. the.

c consti'uetion, errmxgemeeQend relative is out the severa Vice,

cation of parts, as Wiil be more fuliy ineseim after pointeci out.

Referring-i1: the direwings ii the senie reference numei eis E'iii be used through views to indicate the same parts,

F 1g 1 1s a rear fiiJVl-tiOlliLi View 0; my sie- Fig. 2 is a, side eievstionai View of my device, wlth pests broken away.

3 is an eniergeci View of e .seeisioli of hi my-d evice, parfiy in elevation end @iiltlf? in section, on the iine 3 3, showing the method of mounting vibrating membranes, emi file vibrating memos, I

i is as eievatione'i sud sectional iew on fine 4 4.- sf 1F 2 1 of pen; of tie vise with some c 33 ii is broken Show? g eteiis of wusiruetion.

Fig. 5 is side eieve bioeei View of spores of the vibmibing motor. Fig, 5 is a; top Zen of the means useai for mouniing an armature of vibrating u 1;; .is e side eievut-ioeei "viewer? iae same 1925. serial 1%. *Qififii.

g. 8 s ihdoiw lei'l View of the armature. "r I lily inveimon iziciudes e supporting bone upward}? therefrom,

1 {no ring 3 15 u g ime iending arms whicn secured to it b'v D'IQZILE of machine screws 9. Mounted on the other end oi these arms 8, is u two partring member 3.0, within which one vibrating menibrune l1 cimnped Within the vibrating membrane a mounted another membrane 12, which has extending through holes 13, the supporting arms 8. ewe nested membi'uncs 11 and 12 are rigidly secured toge'her at their ouior ei" W by as glue or similar bindf 211 the offsetportion '7, is :0 Wed ufpermen ent horse- 'n c; iootor by means of a Exilemied; transversely 14 of she permanent 'EiQC'ES psoviiag" use I 21. their sues, a short six mam-magnetic members 1.7 and are secured on opposiie sides of? hev pole gsieces, to provide a support for she solenoid ooi 21 and. the armature 20-. v armature be]? 18, is an insulating support 22, onwhich are mounted two binding posts-23, 23, to wiilch the leads of the solenoid co-ii are brought. Extending parallel to the poie piece 16, and attached. to the armature 20, is

a short arm 24, which is seoure it its free end to a flexible. member 25, Which'is seemed so a, pifojec 1 which is integrai with the EJiBCQ Y. Extending parallel to the short enn 24, on the o sposite side of the member 25, anocher rod 26, is secured to the membrane 12 by means of clamping device 537. At the point of attachment ofi he rod 26 is the membrane 12., is a, reinforcii'zg membez 28, secureoi oi the apex of the vibrateone' f0 prevent the membrane Weak emng as; .5 point. The vibrations of Lesa ure are thmugh mi 52.6

as membrane 12 which being attached at its ed e to the membrane 11 in turn sets it in "vi ration. 4 From the foregoing description, itwill be at once evident hat I have produced a new and novel sound reproducing device, consisting of a plurality of conical membranes nested 'within each other and being rigidly secured together at their outer edges. One of the membranes is attached at its center to the vibrating means, and the other is attached at its similar free end to a supporting ring,

which serves as a support for the entire vibrating structure,

I am, of course, aware that the idea of my invention may assume many physical forms, and I do not, therefore, desire to be limited to the specific embodiment which I have shown for purposes of illustration, but rather and of my own invention, and desire to secure by Letters Patent is:

1. In a sound reproducing device, a support, vibrating means mounted on said support, a plurality of arms mounted on said support, a plurality of nested cones mounted on a ring, said ring being secured to said arms and said vibrating means being attached to one of said cones.

2. In a sound reproducing device, a support,- vibrating means mounted on said support, a plurality of arms mounted on said support, a vibratile member comprising a plurality of membranes mounted on said support, and connected to said vibrating means at least one of said members being secured to said arms.

3.111 a sound reproducing device, a support, electrical vibrating means mounted on said support, a member comprising a regular cone and a truncated cone nested together, said regular cone being secured to said vibratweasel "ing means, and a ring, said ring being secured to said truncated cone and mounted on said support.

4. In a sound reproducing device,a support, electrical vibrating means mounted on said support, a member comprising a regular cone and a truncated cone nested together and "rigidly attached at their free edges, said regular cone being secured to said vibrating means, and a ring, said ring being secured to said truncated cone and mounted on said support.

5. in a sound reproducing device, a base having an integral upright, a substantially ring shaped member secured to said upright, a transverse support attached to said ring, vibrating means on said support, a plurality of arms attached to said ring, a tympanum on said arms comprising nested membranes and secured to said vibrating means.

6. In a sound reproducing device, a base having an integral u right, a substantially ring shaped member secured to said upright, a transverse support attached to said ring, vibrating means on said support, a plurality of arms attached to said ring, a tympanum com prisi'n a plurality of nested cones mounted on said ring member and connected to said vibrating means 7. In a sound reproducing device, a base havin an integral upright,',a substantially "ring s raped member secured to said upright,

a transverse support attached to said ring, vibrating means on said support, a plurality of arms attached to said ring, a tympanum comprising a regular cone and a truncated cone nested one within the other, and rigidly secured together at their large diameters, a

ring rigidly secured to the truncated edge of said truncated cone, and attached to said arms, said regular cone being fastened to said vibrating means.

In testimony whereof I have hereunto set my hand on this th day of November, A. D.,

JOHN B. ELENSGHNEIDERV 

